Hey, TMM, let us know what you find. I just measured an original '62 225 /6 had gasket with a micrometer in a few spots: 0.020" thick in the flat areas.
Will do. SeattleQQ1 was nice enough to offer to send them my way. I can post the results here. I f I would have just saved mine when I took my 273 apart. :BangHead::BangHead: